Using only EDX it is not possible to distinguish between pyrite and marcasite, which, although they have equal compositions, have different crystalline structures. Or silica from quartz. I wonder if using the EBSD technique it is possible to differentiate one from another.
You should be able to record the Electron Channeling Pattern (ECP) which is the underlying effect in EBSD. That should be sensitive for the crystal structure, maybe check out
Article Basic Principles and Application of Electron Channeling in a...
Yes, it is possible. By using "phase map" in EBSD softwares, phases with different crystalline structure will show different colors. (in the premise that the crystalline structures of the phases are known and the crystal parameters of them have been input into the EBSD software.)
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